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For the Inventor, By the Inventor

Osaka, Japan

Elephant Chain Block Co., Ltd.

Calculating rank
USPTO Granted Patents = 40

% Expired Patents = 5.0

Trademarks = 3

Forward Citations = 266

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21 inventors (with patents filed for the assignee):

goldMedal Yasuo Wada (13 out of 13 patents)

silverMedal Yoshio Ueno (13 out of 16 patents)

bronzeMedal Masaru Fujikawa (12 out of 12 patents)

4.  Munenobu Honda (10 out of 10 patents)

5.  Haruo Kubota (9 out of 9 patents)

6.  Koji Saai (8 out of 8 patents)

7.  Yoshio Nishi (8 out of 8 patents)

8.  Yosiaki Okamoto (4 out of 4 patents)

9.  Takasi Uesugi (4 out of 4 patents)

10.  Eikiti Kobayasi (4 out of 4 patents)

11.  Tadasu Matusima (2 out of 2 patents)

12.  Hidenori Fujiwara (2 out of 2 patents)

13.  Eikichi Kobayashi (2 out of 2 patents)

14.  Yoshiaki Okamoto (2 out of 2 patents)

15.  Yoshitaka Inoue (2 out of 2 patents)


Core Competencies:
Lifting Gear
Chain Block
Hoist
Belt Hoist
Manual Chain Block
Overload Protection
Free Rotation Control
Mechanical Brake
Lifting Apparatus
Load Chain Retainment
Sling
Lever Hoist

40 patents:

1. 6554255 - Lifting gear (2003-04-29),
2. D459855 - Lifting hook (2002-07-03),
3. D459854 - Lifting apparatus (2002-07-03),
4. 6406001 - Chain lever hoist (2002-06-18),
5. 6390523 - Belt hoist (2002-05-21),
6. 6371543 - Sling (2002-04-16),
7. 6241214 - Structure supporting apparatus (2001-06-05),
8. 6224039 - Chain block (2001-05-01),
9. 6142448 - Belt hoist (2000-11-07),
10. 6062543 - Hand operated chain block having an improved load chain device (2000-05-16),
11. D424269 - Wheel cover for chain block (2000-05-02),
12. 6032928 - Hand operated chain block having improved hand wheel (2000-03-07),
13. 6030015 - Belt hoist having improved belt-hook assembly (2000-02-29),
14. D421172 - Hoist body of lever type (2000-02-22),
15. 6007054 - Hand operated chain block having an improved cover (1999-12-28),
Company Overview
Elephant Chain Block Co., Ltd., based in Osaka, Japan, specializes in the development and manufacturing of lifting equipment. The company offers a diverse range of products, including chain blocks, lever hoists, belt hoists, and manual and electric hoists, designed to enhance lifting efficiency and safety in various industrial applications. With a focus on mechanical brake technology, Elephant Chain Block is committed to providing reliable solutions that meet the evolving needs of the lifting and material handling sectors.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 27 2026

40 Patents

#212 in Osaka

#1,981 in Japan

#17,098 in the World

Osaka, JP
Osaka, Japan

Elephant Chain Block Co., Ltd.

Forward Citations = 266

21 inventors:

goldMedal Yasuo Wada (13 out of 13 patents)

silverMedal Yoshio Ueno (13 out of 16 patents)

bronzeMedal Masaru Fujikawa (12 out of 12 patents)

4.  Munenobu Honda (10 out of 10 patents)

5.  Haruo Kubota (9 out of 9 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Elephant Chain Block Co., Ltd.. Retrieved from https://idiyas.com/company/elephant-chain-block-company

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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